With Khan and Gold, it is GREAT to stack Stage 1 with Stage 4.
That’s the only way to have the full product - goals AND healing.
Over time, Stage 1s will simply not be as necessary, because most limiting beliefs have been sorted out.
Personally, I find Stage 2s to be conflicting with the Stage 3s & 4s, because they make us question our goals & plans - making it difficult to ACT on them.
Edit - PS: I’ve not used Stage 1s of Alchemist or QL, and they are anyways incorporated fully in the Stage 4s. So stacking may never be required.
Stage 1s are NOT designed to Break Down the Walls of your Goal Fortress, their job is to break down the enemy’s walls 
… Limiting Beliefs, Toxic Shame, Unworthiness, Fears, Unproductive Assumptions, Negative Judgements, etc.
You could say that they actually Build Up your Self Esteem.
As the Khan salespage says: